Key-fastener.



No. 736,985. PATENTBD AUG. 25, 1903. R. L. LUMRY.

KEY PASTENER.

APPLICATION FILED FEB. 6, 1903. I

'No MODEL.

UNITE STATES.

Patented August 25, 190? PATENT OFFICE.

KEY-FASTEN ER.

SPECIFICATION forming part of Letters Patent No. 736,985, dated August25, 1903. Application filed February 6, 1903. Serial No. 142,210. (Nomodel.)

To aZZ whom it may concern.-

Beit known that I, RUFUs L. LUMRY, a citizen of the United States,residing at Fort Oollins, in the county of Larimer, State of 0010- rado,have invented certain new and useful Improvementsiu Door-Key Fasteners;and

. I do hereby declare the following to be a full,

clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to fasteners for door-.

keys; and it has for its object to provide an attachment to thelock-plate which may be adjusted to prevent removal of the key from theoutside of the door-and also to prevent rotation of the key, a furtherobject'of the invention beingto provide a construction which cannot beshifted from its operative position from outside the door.

In the drawings forming a portion of this specification, and in'whichlike numerals of reference indicate similar partsin the several views,Figure l is a perspective View showing the rear side of a lock-plateequipped with the present invention. Fig. 2 is a transverse section online 2 2 of Fig. 1. Fig. 3 is a perspective view of the rear side of theshiftable fastening device. Fig. 4 is a section on line 4 4.. Fig. 5 isan elevation showing the style of key with which the fastener isemployed.

Referring now to the drawings, there is shown a plate 5, which may betermed the lock-plate and which is ordinarily secured over the face ofthe door to form a frame for the keyhole, so as to present an ornamentalappearance, and through this plate is formed the usual keyhole 6 toregister with the corresponding hole in the door and the lock-casing,said keyhole including the usual cylindrical portion, from which extendsa narrowed portion to receive the web or wing of the key.

In the face of the plate 5 is formed a transverse dovetailed groove 7,in which is slidably engaged a plate 8, having in it a keyhole 9, sopositioned as to register with the hole 6 when the plate 8 is in properposition. From the cylindrical portion of the keyhole 9 eX- tendslaterally a slot 10, it being understood that the narrowed portion ofthe'keyhole 6 and the corresponding portion of the keyhole 9 extendvertically or at right angles to the direction of sliding movement ofthe plate 8, which plate may be known as the lockingplate.

When the key is to be inserted in the door, the plate 8 is shifted toaline the holes 6 and 9, the key employed being a fiat-stemmed key 11,as illustrated. After the key has been turned to shoot the bolt of thelock it is adjusted to lie with its flattened stem in horizontalposition, at which time the plate 8 may be shifted laterally to receivethis flattened stem of the key in the slot 10, the dimensions of-whichare such as to receive the stem of the key snugly and hold it againstrotation. Wlfen the door is to be unlocked, the plate 8 is shifted inthe opposite direction to aline the cylindrical portions of thekeyholes, when the key may be rotated and subsequently withdrawn.

To prevent displacement of the lockingplate from the plate 5, a screw 12is engaged through the plate 5 and enters a slot 13, formed transverselyof the rear side of the locking-plate, this screw'lying in the path ofmovement of the ends of the slot.

To prevent shifting of the locking-plate.

from its active position, locking-dogs 14 are pivoted in suitable slots15 in said plate and are so shaped that when moved in one direction upontheir pivots they will pass through the slots and engage correspondingslots 16 in the plate 5. Other slots 17 are formed in the plate 5 forengagement by the retainingdogs when the locking-plate is shifted toinactive position. The locking-dogs have handles 18 of such lengths thatwhen the dogs are in active position these handles project above theplate 8 and lie spaced from the plate 5, so that they may be readilygrasped to swing them into inactive or disengaging positions. With thisconstruction it will be seen that the locking-plate may be positioned topermit of insertion and rotation of thekey and may then be shifted tohold the key against rotation either to lock or unlock the door.

What is claimed is-- The combination with a lock-plate having a keyholetherein, of a second plate slidably mounted thereon, the second platehaving a keyhole for registration with that of the first plate and aslot leading therefrom in a direction opposite'to the direction ofmovement of the sliding plate to carry its keyhole out of registrationwith that of the first plate, the

sliding plate having slots therein and the first-named plate having aplurality of slots for each of the slots of the sliding plate forregistration with the latter alternately, and dogs pivoted in the slotsof the sliding plate

